// SPDX-License-Identifier: GPL-1.0+
/*
* OHCI HCD ( Host Controller Driver ) for USB .
*
* ( C ) Copyright 1999 Roman Weissgaerber < weissg @ vienna . at >
* ( C ) Copyright 2000 - 2002 David Brownell < dbrownell @ users . sourceforge . net >
* ( C ) Copyright 2002 Hewlett - Packard Company
* ( C ) Copyright 2006 Sylvain Munaut < tnt @ 246 tNt . com >
*
* Bus glue for OHCI HC on the of_platform bus
*
* Modified for of_platform bus from ohci - sa1111 . c
*
* This file is licenced under the GPL .
*/
#include <linux/signal.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
static int
ohci_ppc_of_start(struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
int ret;
if ((ret = ohci_init(ohci)) < 0 )
return ret;
if ((ret = ohci_run(ohci)) < 0 ) {
dev_err(hcd->self.controller, "can't start %s\n" ,
hcd->self.bus_name);
ohci_stop(hcd);
return ret;
}
return 0 ;
}
static const struct hc_driver ohci_ppc_of_hc_driver = {
.description = hcd_name,
.product_desc = "OF OHCI" ,
.hcd_priv_size = sizeof (struct ohci_hcd),
/*
* generic hardware linkage
*/
.irq = ohci_irq,
.flags = HCD_USB11 | HCD_DMA | HCD_MEMORY,
/*
* basic lifecycle operations
*/
.start = ohci_ppc_of_start,
.stop = ohci_stop,
.shutdown = ohci_shutdown,
/*
* managing i / o requests and associated device resources
*/
.urb_enqueue = ohci_urb_enqueue,
.urb_dequeue = ohci_urb_dequeue,
.endpoint_disable = ohci_endpoint_disable,
/*
* scheduling support
*/
.get_frame_number = ohci_get_frame,
/*
* root hub support
*/
.hub_status_data = ohci_hub_status_data,
.hub_control = ohci_hub_control,
#ifdef CONFIG_PM
.bus_suspend = ohci_bus_suspend,
.bus_resume = ohci_bus_resume,
#endif
.start_port_reset = ohci_start_port_reset,
};
static int ohci_hcd_ppc_of_probe(struct platform_device *op)
{
struct device_node *dn = op->dev.of_node;
struct usb_hcd *hcd;
struct ohci_hcd *ohci;
struct resource res;
int irq;
int rv;
int is_bigendian;
struct device_node *np;
if (usb_disabled())
return -ENODEV;
is_bigendian =
of_device_is_compatible(dn, "ohci-bigendian" ) ||
of_device_is_compatible(dn, "ohci-be" );
dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n" );
rv = of_address_to_resource(dn, 0 , &res);
if (rv)
return rv;
hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB" );
if (!hcd)
return -ENOMEM;
hcd->rsrc_start = res.start;
hcd->rsrc_len = resource_size(&res);
hcd->regs = devm_ioremap_resource(&op->dev, &res);
if (IS_ERR(hcd->regs)) {
rv = PTR_ERR(hcd->regs);
goto err_rmr;
}
irq = irq_of_parse_and_map(dn, 0 );
if (!irq) {
dev_err(&op->dev, "%s: irq_of_parse_and_map failed\n" ,
__FILE__);
rv = -EBUSY;
goto err_rmr;
}
ohci = hcd_to_ohci(hcd);
if (is_bigendian) {
ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
if (of_device_is_compatible(dn, "fsl,mpc5200-ohci" ))
ohci->flags |= OHCI_QUIRK_FRAME_NO;
if (of_device_is_compatible(dn, "mpc5200-ohci" ))
ohci->flags |= OHCI_QUIRK_FRAME_NO;
}
ohci_hcd_init(ohci);
rv = usb_add_hcd(hcd, irq, 0 );
if (rv == 0 ) {
device_wakeup_enable(hcd->self.controller);
return 0 ;
}
/* by now, 440epx is known to show usb_23 erratum */
np = of_find_compatible_node(NULL, NULL, "ibm,usb-ehci-440epx" );
/* Work around - At this point ohci_run has executed, the
* controller is running , everything , the root ports , etc . , is
* set up . If the ehci driver is loaded , put the ohci core in
* the suspended state . The ehci driver will bring it out of
* suspended state when / if a non - high speed USB device is
* attached to the USB Host port . If the ehci driver is not
* loaded , do nothing . request_mem_region is used to test if
* the ehci driver is loaded .
*/
if (np != NULL) {
if (!of_address_to_resource(np, 0 , &res)) {
if (!request_mem_region(res.start, 0 x4, hcd_name)) {
writel_be((readl_be(&ohci->regs->control) |
OHCI_USB_SUSPEND), &ohci->regs->control);
(void ) readl_be(&ohci->regs->control);
} else
release_mem_region(res.start, 0 x4);
} else
pr_debug("%s: cannot get ehci offset from fdt\n" , __FILE__);
of_node_put(np);
}
irq_dispose_mapping(irq);
err_rmr:
usb_put_hcd(hcd);
return rv;
}
static void ohci_hcd_ppc_of_remove(struct platform_device *op)
{
struct usb_hcd *hcd = platform_get_drvdata(op);
dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n" );
usb_remove_hcd(hcd);
irq_dispose_mapping(hcd->irq);
usb_put_hcd(hcd);
}
static const struct of_device_id ohci_hcd_ppc_of_match[] = {
#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE
{
.name = "usb" ,
.compatible = "ohci-bigendian" ,
},
{
.name = "usb" ,
.compatible = "ohci-be" ,
},
#endif
#ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE
{
.name = "usb" ,
.compatible = "ohci-le" ,
},
#endif
{},
};
MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match);
#if !defined (CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \
!defined (CONFIG_USB_OHCI_HCD_PPC_OF_LE)
#error "No endianness selected for ppc-of-ohci"
#endif
static struct platform_driver ohci_hcd_ppc_of_driver = {
.probe = ohci_hcd_ppc_of_probe,
.remove = ohci_hcd_ppc_of_remove,
.shutdown = usb_hcd_platform_shutdown,
.driver = {
.name = "ppc-of-ohci" ,
.of_match_table = ohci_hcd_ppc_of_match,
},
};
Messung V0.5 in Prozent C=97 H=100 G=98
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-09-28)
¤
*© Formatika GbR, Deutschland